Edit question template to direct users to GH Discussions

Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from #21393)

.github/ISSUE_TEMPLATE/question.md

@@ -1,56 +1,10 @@
 ---
 name: Question
 labels: 'issue: question'
-about: Ask a question about OpenSSL
+about: Please use Q&A in Discussions instead
 ---
 
-<!--
-Thank you for your interest in OpenSSL. If this is your first question,
-please take the time to read the following lines before posting it.
+Please do NOT use issues to ask questions about OpenSSL.
 
-For general questions about *using* OpenSSL:
-
-    If you have questions about how to use OpenSSL for specific tasks
-    or how to solve certain problems you have when using it, you might
-    want to ask them on the openssl-users@openssl.org mailing list.
-    There you can get help from a great community of OpenSSL users,
-    not only (but including) the OpenSSL developers. For more information
-    about our mailing lists, see
-    https://www.openssl.org/community/mailinglists.html.
-
-For questions related to build issues:
-
-    Please use the 'Bug report' template.
-
-For other questions:
-
-    Please describe your problem as concisely as possible while giving
-    us enough information to understand your problem. Example code
-    or example commands are highly appreciated if they help us to
-    better understand what you are trying to achieve.
-
-    Also, please remember to tell us which OpenSSL version you are
-    using and whether it is system provided or you built it yourself.
-    In the latter case, please also send us your build configuration.
-    With OpenSSL before 1.1.1, the configuration output comes from the
-    configuration command.  With OpenSSL 1.1.1 and on, you can obtain
-    the information by running the command `perl configdata.pm --dump`
-    in the root directory of the source tree.
-
-Please remember to put ``` lines before and after any commands plus
-output and code, like this:
-
-    ```
-    $ echo output output output
-    output output output
-    ```
-
-    ```
-    #include <stdio.h>
-
-    int main() {
-        int foo = 1;
-        printf("%d\n", foo);
-    }
-    ```
--->
+Instead, please use the [Q&A category in Discussions](<https://github.com/openssl/openssl/discussions/new?category=q-a>)
+to ask your question.